Quick checklist
Check gas cap inspect all EVAP hoses check purge valve connections
OBD2 Codes
P0455 – Evaporative Emission Control System Leak Detected (Large Leak)
Large leak detected in EVAP system; check hoses and connections.
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Details
Large leak in the evaporative emission system. Check hoses connections and purge valve.
Typical causesLoose gas cap damaged EVAP hose disconnected hose failed purge valve
SymptomsCheck engine light fuel smell
SeverityMedium — may cause fuel smell and emissions failure
DIY checksCheck gas cap inspect all EVAP hoses check purge valve connections
ToolsSmoke machine for leak detection
Utilities
Copy-paste helpers
FAQ
Common questions
Can I ignore this code?
Not recommended—large leaks can cause fuel smell and emissions failure.